$ git clone -n https://src.fedoraproject.org/rpms/ocaml-obuild.git /var/lib/mock/f39-build-1465552-33593/root/chroot_tmpdir/scmroot/ocaml-obuild
Cloning into '/var/lib/mock/f39-build-1465552-33593/root/chroot_tmpdir/scmroot/ocaml-obuild'...
$ git fetch origin c63ba03939959b38058b174b174bbf7ac32d4b7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-obuild
 * [new ref]         c63ba03939959b38058b174b174bbf7ac32d4b7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c63ba03 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild